Design for an anti-theft device



FIG. 1 is a perspective view of the assembled article from the top and to the side of one end of thereof;

FIG. 2 is a perspective view of the assembled article from the top and to the side of the opposite end thereof;

FIG. 3 is a plan view of the assembled article from the top thereof;

FIG. 4 is a plan view of the assembled article from the bottom thereof;

FIG. 5 is a view of the assembled article from the left side thereof in FIG. 3;

FIG. 6 is a view of the assembled article from the right side thereof in FIG. 3;

FIG. 7 is a view of the assembled article from the lower end thereof in FIG. 3;

FIG. 8 is a view of the assembled article from the upper end thereof in FIG. 3;

FIG. 9 is a plan view of a first component of the article from the top thereof;

FIG. 10 is a plan view of the first component from the bottom thereof;

FIG. 11 is an end view of the first component from the lower end thereof in FIG. 9;

FIG. 12 is an end view of the first component from the upper end thereof in FIG. 10;

FIG. 13 is an side view of the first component from the left side thereof in FIG. 9;

FIG. 14 is an side view of the first component from the right side thereof in FIG. 9;

FIGS. 15 to 17 are sectional views on Arrows A--A, B--B and C--C respectively in FIG. 9;

FIG. 18 is a sectional view on Arrows D--D in FIG. 9;

FIG. 19 is a plan view of a second component of the article from the bottom thereof;

FIG. 20 is a plan view of the second component from the top thereof;

FIG. 21 is an end view of the second component from the upper end thereof in FIG. 19;

FIG. 22 is an end view of the second component from the lower end thereof in FIG. 20;

FIG. 23 is an side view of the second component from the right side thereof in FIG. 20;

FIG. 24 is an side view of the second component from the left side thereof in FIG. 20;

FIGS. 25 to 27 are sectional views on Arrows A--A, B--B and C--C respectively in FIG. 20; and,

FIG. 28 is a sectional view on Arrows D--D in FIG. 20. 

The ornamental design for an anti-theft device, as shown. 